/ 2 \ x*\x - 9/
x*(x^2 - 1*9)
1*(x + 3)*(x + 0)*(x - 3)
((1*(x + 3))*(x + 0))*(x - 3)
3 x - 9*x
x^3 - 9*x
x*(-9.0 + x^2)
x*(-3 + x)*(3 + x)